His Royal Highness Prince Friedrich Karl of Prussia was a son of Prince Charles of Prussia and his wife, Princess Marie of Saxe-Weimar-Eisenach. He was a career military officer. He married Princess Maria Anna of Anhalt-Dessau and they had five children.
Joachim Ernesto, duca di Anhalt 1901-1947.Figlio di Edoardo e Luisa di Sassonia Altenburg.Sposa 1903 Ottilia Strickrodt e 1905 Edith von Stephani. Da questa le figlie Alessandra (n:1930) e Anna Luisa (n.1933)